package cn.tedu._05weibo.controller;

import cn.tedu._05weibo.common.response.JsonResult;
import cn.tedu._05weibo.common.response.StatusCode;
import cn.tedu._05weibo.mapper.UserMapper;
import cn.tedu._05weibo.pojo.dto.UserRegDTO;
import cn.tedu._05weibo.pojo.entity.User;
import cn.tedu._05weibo.pojo.vo.UserVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;
import springfox.documentation.annotations.ApiIgnore;

import javax.servlet.http.HttpSession;
import java.util.Date;
/*
Slf4j注解
    1.日志注解,添加在类上

 */
@Slf4j
@RestController
@RequestMapping(value = "/v1/users/")
@Api(tags = "01.用户模块")
public class UserController {
    //自动装配
    @Autowired
    private UserMapper userMapper;
    /**
     * 注册功能
     *      ResponseBody注解:Java对象 ----->JSON格式 ------->Web前端
     *      RequestBody注解: JS对象 ------->JSON格式 ------->Java服务端
     */
    @ApiOperation("注册功能")
    @PostMapping("reg")
    public JsonResult reg(@RequestBody @Validated UserRegDTO userRegDTO){
        //以日志的形式打印输出
        log.debug("userRegDTO = " + userRegDTO);
//        System.out.println("userRegDTO = " + userRegDTO);
        /*
            1.接收参数[已完成]
            2.数据合法性校验[暂时不做,后续用验证框架做]
            3.校验用户名是否被占用[SELECT接口]
                3.1 被占用，return 2;
                3.2 没被占用,[INSERT接口],return 1;
         */
        //校验用户名是否被占用
        UserVO userVO = userMapper.selectByUsername(userRegDTO.getUsername());
        if (userVO != null){//被占用
            return new JsonResult(StatusCode.USERNAME_ALREADY_EXISTS);
        }
        //未被占用
        User user = new User();
        BeanUtils.copyProperties(userRegDTO,user);
        user.setCreated(new Date());
        userMapper.insert(user);
        return JsonResult.ok();//注册成功
    }
    @ApiOperation("登录功能")
    @PostMapping("login")
    public JsonResult login(@RequestBody UserRegDTO userRegDTO, @ApiIgnore HttpSession session){
        log.debug("userRegDTO = " + userRegDTO);
//        System.out.println("userRegDTO = " + userRegDTO);
        UserVO userVO = userMapper.selectByUsername(userRegDTO.getUsername());
        if (userVO==null){//用户名错误
            return new JsonResult(StatusCode.USERNAME_ERROR);
        }
        if(userVO.getPassword().equals(userRegDTO.getPassword())){
            //设置唯一标识,用于会话标识
            session.setAttribute("user",userVO);
            return new JsonResult(StatusCode.LOGIN_SUCCESS);//登陆成功
        }
        return new JsonResult(StatusCode.PASSWORD_ERROR);//密码错误
    }
    /*
        获取当前用户功能
     */
    @ApiOperation("获取当前用户")
    @GetMapping("currentUser")
    public JsonResult currentUser(@ApiIgnore HttpSession session){
        UserVO userVO =(UserVO) session.getAttribute("user");
        return JsonResult.ok(userVO);
    }
    /*
        退出登录
     */
    @ApiOperation("退出登录")
    @GetMapping("logout")
    public void logout(@ApiIgnore HttpSession session){
        //删除服务器端的会话唯一标识
        session.removeAttribute("user");
    }
}
